Aerospace O-ring family, silicone, AMS7267
AS9386 O-rings: silicone 70 to 80 to AMS7267
AS9386-XXX is a silicone (VMQ) O-ring made from AMS7267 material, the heat resistant, low compression set silicone in the 70 to 80 hardness class, with the AS568 nominal size of the same dash; the DoD MS9386 sheet holds a tighter inside-diameter tolerance than AS568 above 0.500 in. AS9385-YY is the callout for the same material in the straight-thread boss sizes. AS9386 and AMS7267 are current; SAE cancelled AS9385 in October 2020, and DoD withdrew its adoption on 2024-02-22, naming SAE-AS9386 as the replacement. MS9386 and MS9385 are the legacy callouts.
- Polymer
- Silicone (VMQ)heat resistant, low compression set
- Durometer
- 70 to 80the AMS7267 class
- Current drawing
- AS9386Brevised 2021; AS9385 cancelled 2020
- QPL
- Not statedSAE document
Specification: documents, status, material
| Item | Value | Source |
|---|---|---|
| Standard-size drawing | SAE-AS9386, O-ring molded from AMS7267 silicone (VMQ) rubber: Revised; current revision AS9386B, 2021-07-07 (reaffirmed 2018; revision A dated January 2020; revised to B in July 2021) | SAE Mobilus, read 2026-09-27 |
| Boss-size drawing | SAE-AS9385, packing, preformed, AMS7267, O-ring: Canceled; reaffirmed 2018, cancelled October 2020 (AS9385A, 2020-10-26); DoD withdrew its adoption on 2024-02-22, naming SAE-AS9386 as the replacement | SAE Mobilus and DLA ASSIST, read 2026-09-27 |
| Material document | SAE-AMS7267, rings, sealing, silicone rubber, heat resistant, low compression set (70 to 80): current AMS7267H, 2021-05-19 | SAE Mobilus, read 2026-09-27 |
| Legacy callouts | MS9386-XXX and MS9385-YY, the DoD drawings (MS9386 Revision B and MS9385 Revision A, both 1975-01-17): MS9386 was canceled on 1999-10-15 and superseded by SAE-AS9386, and MS9385 on 1999-12-29 by SAE-AS9385, each with the same part numbers | DLA ASSIST idents 37861 and 37860, read 2026-09-27 |
| Tolerance note | The MS9386 and MS9385 sheets give each dash the AS568 nominal size of the same dash (MS9385 the AS568-9YY boss size); their inside-diameter tolerance equals AS568's up to 0.500 in and is tighter above it. The current AS9386B table was not read, so the drawing the print names governs | DLA ASSIST idents 37861 and 37860, read 2026-09-27 |
| Base polymer | Silicone (VMQ) | document title |
| Durometer | 70 to 80, the hardness class in the AMS7267 title; manufacturers supply it at 75 | SAE Mobilus title, read 2026-09-27; Parker® ORD 5700 (2021) Table 8-4, read 2026-09-24 |
| Slash sheets / classes | None | SAE Mobilus and DLA ASSIST, read 2026-09-27 |
| Boss variant | AS9385-YY, the boss series: the MS9385 sheet gives each dash as the tube outside diameter in sixteenths of an inch with the AS568-9YY nominal size; SAE cancelled AS9385 in October 2020 and DoD withdrew its adoption on 2024-02-22, naming SAE-AS9386 as the replacement; one manufacturer's 2024 cross-reference lists AS9386 as now including the -9YY boss parts, and both numbers are kept here because a print can still call out either | DLA ASSIST idents 37860 and 207707 and SAE Mobilus, read 2026-09-27; one manufacturer's cross-reference (2024), read 2026-09-27 |
| QPL | Not stated on the SAE pages read | SAE Mobilus and DLA ASSIST, read 2026-09-27 |
| Service | Heat resistant, low compression set (the AMS7267 title) | document title |
| Compounds manufacturers pair with this document | Parker ORD 5700 (2021) Table 8-4 pairs S0355-75 with AMS7267 in the 70 to 80 band | Parker ORD 5700 (2021) Table 8-4, read 2026-09-24 |
Status strings are quoted as DLA ASSIST and SAE Mobilus print them (Canceled is ASSIST's spelling; Inactive means inactive for new design; Withdrawn is SAE's word). Conquest Seal is a distributor and is not itself listed on any qualified products list.
Designator to AS568 size
AS9386-XXX carries the three-digit AS568 dash, and AS9385-YY the two-digit boss dash, which names the tube outside diameter in sixteenths of an inch and has the AS568-9YY nominal size. The DoD size sheets, MS9386 Revision B and MS9385 Revision A, give each dash the AS568 nominal size of the same dash but hold a tighter inside-diameter tolerance than AS568 above 0.500 in, so the drawing governs. One manufacturer's 2024 cross-reference lists AS9386 as now including the -9YY parts formerly numbered AS9385-YY. MS9386 and MS9385 carry the same dashes, and the dash never changes the material.
| AS9386 | MS9386 | AS568 dash | ID in | W in | ID mm | W mm |
|---|---|---|---|---|---|---|
| AS9386-006 | MS9386-006 | AS568-006 | 0.114 | 0.070 | 2.90 | 1.78 |
| AS9386-010 | MS9386-010 | AS568-010 | 0.239 | 0.070 | 6.07 | 1.78 |
| AS9386-012 | MS9386-012 | AS568-012 | 0.364 | 0.070 | 9.25 | 1.78 |
| AS9386-112 | MS9386-112 | AS568-112 | 0.487 | 0.103 | 12.37 | 2.62 |
| AS9386-114 | MS9386-114 | AS568-114 | 0.612 | 0.103 | 15.54 | 2.62 |
| AS9386-116 | MS9386-116 | AS568-116 | 0.737 | 0.103 | 18.72 | 2.62 |
| AS9386-210 | MS9386-210 | AS568-210 | 0.734 | 0.139 | 18.64 | 3.53 |
| AS9386-214 | MS9386-214 | AS568-214 | 0.984 | 0.139 | 24.99 | 3.53 |
| AS9386-222 | MS9386-222 | AS568-222 | 1.484 | 0.139 | 37.69 | 3.53 |
| AS9386-325 | MS9386-325 | AS568-325 | 1.475 | 0.210 | 37.47 | 5.33 |
Millimeter values are converted from the inch table. The dash is a size lookup and never a material; the same dash on another family on the mil-spec hub is the same size in a different document. Full chart: AS568 size chart.
AS9386 and AS9385: the part number with its own page
The part number below has its own page: the size in inches and millimeters with tolerances, the document it is procured to, its status and the same size under the other documents. Open the series to find it.
AS9386 part number, 1xx series (1)
Where the documents stand
This family is SAE-native: both drawings name AMS7267 in their titles, so no MIL material specification sits behind it. SAE reaffirmed both in 2018, cancelled AS9385 in October 2020 (the cancelled record is revision A), and revised AS9386 to B on 2021-07-07 (its revision A is dated January 2020), and AMS7267 is at revision H of 2021-05-19. The MS9386 and MS9385 drawings came first (their last revisions, B and A, are dated 1975-01-17): DoD canceled them in 1999 (MS9386 on 1999-10-15, MS9385 on 1999-12-29) and superseded them by the SAE drawings with the same part numbers, so those numbers on older prints are the legacy callouts for the same two drawings.
DoD withdrew its adoption of SAE-AS9385 on 2024-02-22, and the withdrawal notice names SAE-AS9386 as the replacement. One manufacturer's 2024 cross-reference likewise lists AS9385 as obsolete and says AS9386 now includes the -9YY boss parts. A cancelled document can still be the one a print calls out, so this page keeps both numbers and we quote whichever the print reads.
The base polymer
The polymer behind this family is silicone (VMQ). The Parker O-Ring Handbook ORD 5700 family range for Silicone (VMQ) (section 2.2, read 2026-09-14) is -54 C to 204 C; that is the polymer family's range, not this document's requirement, and the compound sheet for the qualified grade governs. Parker notes that specification temperature limits do not necessarily represent operating temperature limits.
Material page: Silicone (VMQ) O-rings. Temperature ranges by family: O-ring temperature ranges.
How we quote this family
Send the designator as printed, AS9386-XXX or AS9385-YY (or the MS9386 / MS9385 form from an older drawing), with the dash, the quantity and the certification the order needs. We quote it supplied against the AS drawing in an AMS7267 silicone compound, with a certificate of conformance and lot traceability. If the print names a compound number, include it and we quote that compound.
Related pages
Other families: MS28775, M83461/1, M83248/1 and M83248/2, M83485/1, M25988/1, /2, /3 and /4, MS29513 and MS29512, NAS1611 and NAS1612, AS3582, AS3209 and AS3208.
Frequently asked
What material is an AS9386 O-ring?
Silicone (VMQ) made from AMS7267 material, the heat resistant, low compression set silicone sealing-ring document in the 70 to 80 hardness class; the AS9386 title names AMS7267 outright. Manufacturers supply it at 75, and Parker ORD 5700 (2021) pairs S0355-75 with AMS7267.
What is the difference between AS9385 and AS9386?
Size series. AS9386-XXX carries the standard sizes with the three-digit AS568 dash, and AS9385-YY the straight-thread boss sizes with the AS568-9YY nominal size, both on AMS7267 silicone. SAE cancelled AS9385 in October 2020, and DoD withdrew its adoption on 2024-02-22, naming SAE-AS9386 as the replacement; Freudenberg Sealing Technologies' Aerospace Part and Material Cross-Reference (brochure, July 2024) says AS9386 now includes the -9YY boss parts. Send whichever number the print reads and we quote that part.
What is AMS7267?
An SAE silicone rubber sealing-ring document, heat resistant with low compression set, 70 to 80 hardness, current at revision H of 2021-05-19. It is the material behind AS9386 and AS9385. It differs from AMS3304, the general heat and weather resistant silicone behind AS3582.
My drawing says MS9386; is that the same part?
Yes, by part number: DoD canceled the MS9386 drawing on 1999-10-15 and superseded it by SAE-AS9386, and the cancellation notice keeps the part numbers identical. MS9385, the boss drawing, was canceled on 1999-12-29 and superseded by SAE-AS9385 the same way. Send the callout as the print reads it and we quote the AMS7267 part with the MS number noted on the paperwork.
Related guides
Sources
SAE Mobilus: AS9386B (revised 2021-07-07), AS9385A (cancelled October 2020) and AMS7267H (revised 2021-05-19), read 2026-09-27; DLA ASSIST: the SAE-AS9385 withdrawal of adoption notice (2024-02-22), and the MS9386 and MS9385 drawings with their cancellation notices (1999), read 2026-09-27; Freudenberg Sealing Technologies, Aerospace Part and Material Cross-Reference (brochure, July 2024), read 2026-09-27, for AS9386 now including the -9YY boss parts; Parker O-Ring Handbook ORD 5700 (2021), Table 8-4, for the compound pairing, read 2026-09-24; Parker O-Ring Handbook ORD 5700, 2021 printing, section IX, AS568 size tables, pages 9-2 to 9-11, read 2026-09-27. Facts are stated in our own words and our own arrangement; no standard's text or table and no manufacturer's cross-reference table is reproduced. Compound pairings are the named manufacturer's published statements, not qualified products list entries.
Parker is a trademark of Parker Hannifin Corporation. No affiliation or endorsement is implied.
Setting Conquest Seal up as a supplier?
Orders are handled under Conquest Seal's AS9100D quality management system, whose certificate scope includes distribution.
Need AS9386 and AS9385 with certification?
Send the designator as the print reads it, the dash, the quantity and the paperwork the order needs. A Conquest representative replies with the part quoted against the document. Quotes answered within one business day. A person answers (714) 632-9830, Pacific business hours.
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