Mil-spec part number, MS29513 and MS29512 family
MS29513-136 O-ring: nitrile (NBR), AS568-136 nominal size
MS29513-136 has the AS568-136 nominal size, 1.987 in (50.47 mm) inside diameter by 0.103 in (2.62 mm) cross-section, in nitrile (NBR) procured to MIL-P-5315 (MS29513 part drawing). The DLA ASSIST and SAE Mobilus records read: Canceled (MIL-P-5315); AS29513C current (revised 2016, reaffirmed 2021). The same part is also printed as AS29513-136. Its DoD sheet, MS29513, holds the inside-diameter tolerance tighter than AS568 above 0.500 in ID, and the document sets the compound, so an AS568-136 ring is not the same part as MS29513-136. Send the designator exactly as the print reads and we quote it against that document.
- Inside diameter
- 1.987 in50.47 mm; tolerance per the MS29513 sheet
- Cross-section
- 0.103 in2.62 mm, +/- 0.003 in
- AS568 nominal size
- AS568-1361xx series
- Document status
- CanceledMIL-P-5315
Part facts
| Item | Value |
|---|---|
| Part number | MS29513-136; also printed as AS29513-136 |
| NSN | 5331-00-291-7295 (DLA FLIS, read 2026-10-08) |
| Stock | In stock in Orange, CA |
| Procured to | MIL-P-5315 (MS29513 part drawing) |
| Size sheet | MS29513 Revision C (1966-09-16), the DoD drawing; canceled on 2001-03-01 and superseded by SAE-AS29513 with the same part numbers |
| SAE document | SAE AS29513; its material specification is SAE AMS-P-5315 |
| Status | Canceled (MIL-P-5315); AS29513C current (revised 2016, reaffirmed 2021) |
| Base polymer | Nitrile (NBR) |
| AS568 nominal size | AS568-136 |
| CAD for the AS568-136 nominal size | AS568-136 STEP 3D solid, AS568-136 DXF 2D drawing, AS568-136 PDF dimensioned drawing; generated from the AS568 nominal dimensions, so verify against your drawing |
| Back-up rings | MS28774-136 (single-turn scarf-cut PTFE) or MS27595-136 (continuous PTFE), both procured to SAE AS8791; both drawings are inactive for new design |
| Dimension | Value | Tolerance |
|---|---|---|
| Inside diameter (ID) | 1.987 in 50.47 mm | tighter than AS568 above 0.500 in ID; see the MS29513 sheet |
| Cross-section (W) | 0.103 in 2.62 mm | +/- 0.003 in (0.08 mm) |
| Outside diameter (reference) | 2.193 in 55.71 mm | derived: ID + 2 x W |
Millimeter values are converted from the inch table. The MS29513 sheet holds the inside-diameter tolerance tighter than AS568 above 0.500 in ID; the drawing governs.
Same nominal size, other documents
Other part numbers for the AS568-136 size
These part numbers name the AS568-136 nominal size under a different document, so each one is a different compound. They are not interchangeable with MS29513-136 unless the print or the buyer's engineering allows it. At this size the family sheets for MS28775-136 and AS9386-136 hold a tighter inside-diameter tolerance than AS568.
| Part number | Document | Polymer | Status |
|---|---|---|---|
| MS28775-136 | MIL-PRF-25732 (MS28775 part drawing) | NBR | Inactive (MIL-PRF-25732); AS28775A current |
| M83461/1-136 | MIL-P-83461/1 | NBR | Canceled; AS83461/1C current |
| M83248/1-136 | MIL-R-83248/1 (Class 1) | FKM | Canceled; AS3209C stabilized; AS83248/1A current |
| M83248/2-136 | MIL-R-83248/2 (Class 2) | FKM | Canceled; AS3581A stabilized; AS83248/2A current |
| AS3209-136 | SAE AS3209 (AMS7276) | FKM | AS3209C stabilized |
| M83485/1-136 | MIL-R-83485 | FKM, low-temperature grade | Canceled |
| M25988/1-136 | MIL-DTL-25988/1 | FVMQ | Active |
| M25988/2-136 | MIL-DTL-25988/2 | FVMQ | Active |
| M25988/3-136 | MIL-DTL-25988/3 | FVMQ | Active |
| M25988/4-136 | MIL-DTL-25988/4 | FVMQ | Active |
| AS3582-136 | SAE AS3582 (AMS3304) | VMQ silicone | AS3582 current |
| AS9386-136 | SAE AS9386 (AMS7267) | VMQ silicone | AS9386B current |
The base polymer
MS29513-136 is nitrile (NBR). The Parker® O-Ring Handbook ORD 5700 range published for the NBR family (section 2.2) is -34 C to 100 C. That is the polymer family's range, not this document's requirement; the compound sheet for the qualified grade governs.
Material page: Nitrile (NBR) O-rings. Every document in the family: MS29513 and MS29512 O-rings.
Nearby MS29513 part numbers
| Part number | ID in | ID mm | W in | W mm |
|---|---|---|---|---|
| MS29513-122 | 1.112 | 28.24 | 0.103 | 2.62 |
| MS29513-128 | 1.487 | 37.77 | 0.103 | 2.62 |
| MS29513-132 | 1.737 | 44.12 | 0.103 | 2.62 |
| MS29513-136 | 1.987 | 50.47 | 0.103 | 2.62 |
| MS29513-138 | 2.112 | 53.64 | 0.103 | 2.62 |
| MS29513-139 | 2.175 | 55.25 | 0.103 | 2.62 |
| MS29513-140 | 2.237 | 56.82 | 0.103 | 2.62 |
Frequently asked
What is the AS568 nominal size of MS29513-136?
MS29513-136 has the AS568-136 nominal size: 1.987 in (50.47 mm) inside diameter by 0.103 in (2.62 mm) cross-section. The MS29513 sheet holds the inside-diameter tolerance tighter than AS568 above 0.500 in ID, and MIL-P-5315 (MS29513 part drawing) sets the nitrile (NBR) compound. An AS568-136 ring shares the nominal size but not the tolerance, so it is not the same part as MS29513-136.
What is the NSN for MS29513-136?
DLA's public FLIS data lists MS29513-136 on NSN 5331-00-291-7295 (read 2026-10-08). An NSN is the federal catalog's number for the item; your contract or print decides what is ordered.
Is MIL-P-5315 still active?
The DLA ASSIST and SAE Mobilus records read: Canceled (MIL-P-5315); AS29513C current (revised 2016, reaffirmed 2021). The first status is the material document's: DLA ASSIST records MIL-P-5315 as canceled on 2002-02-28 and superseded by SAE AMS-P-5315, the material specification, now at revision AMSP5315C (revised 2022-08-05). The second is SAE-AS29513's, the SAE part standard that superseded the MS29513 drawing when DoD canceled the drawing on 2001-03-01; the cancellation notice keeps the part numbers unchanged. Both come from the DLA ASSIST and SAE Mobilus records listed under Sources, with the date each was read. A canceled or inactive MIL document can still be the one a print calls out, and your print decides which you order to.
How do I order MS29513-136?
Send the designator exactly as the print reads, with its revision, any suffix letter, the quantity and the paperwork the order needs. MS29513-136 is quoted and supplied against MIL-P-5315 (MS29513 part drawing) or SAE AS29513 (material specification: SAE AMS-P-5315), in the compound the print calls out, with a certificate of conformance with every order. When the print calls out a QPL-listed specification, the finished molded O-ring, or the material it is molded from, comes from a manufacturer listed on that QPL; Conquest supplies it and is not itself on any QPL. A Conquest representative replies within one business day.
Sources
DLA ASSIST document details, ident 5334 (MIL-P-5315), read 2026-09-24; SAE Mobilus: AMSP5315C (revised 2022-08-05), AS29513C and AS29512C (revised October 2016, reaffirmed November 2021), read 2026-09-27; the NSNs from DLA's public FLIS data (PUB LOG Reference, Identification and Characteristics files, updated 2026-10-01, read 2026-10-08); an NSN is the federal catalog's stock number for an item and does not name or approve a supplier; AS568 nominal dimensions from the Parker O-Ring Handbook ORD 5700, 2021 printing, section IX, AS568 size tables (Series 2-XXX and 3-XXX), pages 9-2 to 9-11, read 2026-10-13; the dash-to-size mapping and the tolerance note from the MS29513 Revision C sheet (1966-09-16) and its cancellation notice (2001-03-01), DLA ASSIST, read 2026-09-27; the other part numbers' dash-to-size mapping and tolerance note from the MS28775 Revision E sheet (1984-03-23, read 2026-10-04) and MS9386 Revision B sheet (1975-01-17, read 2026-09-27), DLA ASSIST; the other part numbers' statuses from DLA ASSIST document details, idents 18115 (MIL-PRF-25732), 33814 (MIL-P-83461/1), 33574 (MIL-R-83248/1), 33575 (MIL-R-83248/2), 33840 (MIL-R-83485/1), 18214 (MIL-DTL-25988/1), 18215 (MIL-DTL-25988/2), 18216 (MIL-DTL-25988/3) and 18217 (MIL-DTL-25988/4), read 2026-09-24; SAE Mobilus current-revision records AS83248/2A, read 2026-09-28; AS83461/1C, AS3209C, AS83248/1A, AS3581A, AS3582 and AS9386B, read 2026-09-27; AS28775A, read 2026-09-25; the MIL-R-83248/1A cancellation notice (Notice 5, 2008-07-24), DLA ASSIST, read 2026-09-29; the SAE-AS83248/2 adoption record, DLA ASSIST ident 286631, read 2026-09-28; the polymers from the Parker O-Ring Handbook ORD 5700A/US, section 8, pages 8-2, 8-4 and 8-5 (read 2026-09-24); the back-up ring pairing and cut styles from the same handbook, section 6, pages 6-8 and 6-9 (read 2026-09-25); SAE AS8791 and the drawings' status from the MS28774M and MS27595E drawings, DLA ASSIST (read 2026-09-28); Parker O-Ring Handbook ORD 5700A/US, section 2.2, for the polymer family range (read 2026-09-14). Facts are stated in our own words and arrangement; no standard's text or table is reproduced.
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Setting Conquest Seal up as a supplier?
Orders are handled under Conquest Seal's AS9100D quality management system, whose certificate scope includes distribution.
Need MS29513-136 with certification?
Send the part number as the print reads it, the quantity and the paperwork the order needs. A Conquest representative replies within one business day. A person answers (714) 632-9830, Pacific business hours.
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