Chart, Mil-Spec / AMS
Mil-Spec O-Ring Chart
The military and SAE O-ring specifications behind mil-spec callouts: each document, its part families, its material and its current status.
Verified register
Documents and their current status
Statuses read from DLA ASSIST and SAE Mobilus on 2026-09-06. The parts are made by manufacturers on the relevant qualified products list, where the document has one; Conquest Seal is a distributor and is not itself listed on any qualified products list.
| Document | Part families | Material | Status |
|---|---|---|---|
| SAE-AS83248/1 | AS83248/1-xxx, M83248/1-xxx (legacy callout) | FKM | Reaffirmed; current revision AS83248/1A (2021-11-08) |
| SAE-AMS7276 | AS3208-xxx, AS3209-xxx, AS83248/1-xxx, M83248/1-xxx (legacy) | FKM | Active |
| SAE-AMS7259 | AS3581-xxx, M83248/2-xxx (legacy) | FKM | Active |
| SAE-AMS7280 | AS3084-xxx, AS3085-xxx | FKM (FPM) | Revised; current revision AMS7280F (1992-01-01) |
| SAE-AMS-R-83485 (AMSR83485) | M83485/1-xxx | FKM (low temperature) | current revision AMSR83485A (2014-05-28) |
| SAE-AMS-P-83461 (AMSP83461) | M83461/1-xxx | NBR | Issued (1998-04-01) |
| SAE-AS83461/1 | AS83461/1-xxx, M83461/1-xxx (legacy callout) | NBR | current revision AS83461/1C (2021-11-08) |
| MIL-P-25732 / MIL-PRF-25732 | MS28775-xxx | NBR | Inactive |
| SAE-AMS-P-25732 (AMSP25732) | MS28775-xxx | NBR | Revised; current revision AMSP25732A (2003-08-05) |
| SAE-AMS-P-5315 (AMSP5315) | AS29512-xxx, AS29513-xxx | NBR | current revision AMSP5315C (2022-08-05) |
| SAE-AMS7270 | AS3569-xxx | NBR | current revision AMS7270M (2022-03-09) |
| SAE-AMS7271 | AS3578-xxx | NBR | Revised; current revision AMS7271K (2025-10-22) |
| SAE-AMS7272 | AS3551-xxx | NBR | current revision AMS7272G (2013-04-12) |
| SAE-AMS7274 | AS3570-xxx | NBR | current revision AMS7274K (2020-07-08) |
| MIL-DTL-25988 / MIL-R-25988 | M25988/1-xxx, M25988/2-xxx, M25988/3-xxx, M25988/4-xxx | FVMQ | Inactive |
| SAE-AMS-R-25988 (AMSR25988) | M25988/1-xxx, M25988/2-xxx, M25988/3-xxx, M25988/4-xxx | FVMQ | Revised; current revision AMSR25988B (2023-06-27) |
| SAE-AMS3325 | M25988/3-xxx (legacy cross-reference) | FVMQ | current revision AMS3325H (2024-09-11) |
| SAE-AMS3304 | AS3582-xxx | VMQ | current revision AMS3304J (2019-04-05) |
| SAE-AMS7267 | AS9386-xxx, AS9385-9yy | VMQ | current revision AMS7267H (2021-05-19) |
| SAE-AS28775 | AS28775-xxx, MS28775-xxx (legacy callout) | NBR | current revision AS28775A (2025-02-08) |
| SAE-AS28778 | AS28778-yy, MS28778-yy (legacy callout) | NBR (boss gasket; usually supplied at 90) | current revision AS28778C (2021-11-08) |
| SAE-AS29513 | AS29513-xxx, MS29513-xxx (legacy callout) | NBR | current revision AS29513C (2021-11-09) |
| SAE-AS29512 | AS29512-xxx, MS29512-xxx (legacy callout) | NBR | current revision AS29512C (2021-11-09) |
| SAE-AS9385 | AS9385-9yy, MS9385-9yy (legacy callout) | VMQ (AMS7267) | Reaffirmed; current revision AS9385A (2020-10-26) |
| SAE-AS9386 | AS9386-xxx, MS9386-xxx (legacy callout) | VMQ (AMS7267) | Reaffirmed; current revision AS9386B (2021-07-07) |
| SAE-AS3084 | AS3084-xxx | FKM (via AMS7280) | Reaffirmed/current; AS3084A (2012-06-06) |
| SAE-AS3085 | AS3085-xxx | FKM (via AMS7280) | Reaffirmed/current; AS3085A (2012-06-06) |
| SAE-AS3208 | AS3208-xxx | FKM (via AMS7276) | Reaffirmed/current; AS3208A (2020-05-12) |
| SAE-AS3209 | AS3209-xxx | FKM (via AMS7276) | Reaffirmed/current; AS3209C (2021-08-03) |
| SAE-AS3551 | AS3551-xxx | NBR (via AMS7272) | Reaffirmed/current; AS3551A (2020-10-09) |
| SAE-AS3569 | AS3569-xxx | NBR (via AMS7270) | Reaffirmed/current; AS3569A (2021-08-09) |
| SAE-AS3570 | AS3570-xxx | NBR (via AMS7274) | Reaffirmed/current; AS3570A (2025-07-17) |
| SAE-AS3578 | AS3578-xxx | NBR (via AMS7271) | Reaffirmed/current; AS3578 (2018-08-23) |
| SAE-AS3581 | AS3581-xxx | FKM (via AMS7259) | Reaffirmed/current; AS3581A (2020-05-12) |
| SAE-AS3582 | AS3582-xxx | VMQ (via AMS3304) | Reaffirmed/current; AS3582 (2018-08-23) |
| SAE-AS568 | AS568-xxx dash numbers | n/a (dimensional standard) | current revision AS568F (2026-01-29) |
| SAE-AS8791 | MS28774-xxx, MS28782-xx, MS27595-xxx | PTFE (back-up ring) | current revision AS8791D (2025-07-16) |
| MIL-DTL-25988/1 | M25988/1-xxx | FVMQ (fluorosilicone) | Active; Revision B Notice 1 (Validation), 21-APR-2026 |
| MIL-DTL-25988/2 | M25988/2-xxx | FVMQ (fluorosilicone) | Active; Revision A Notice 1 (Validation), 21-APR-2026 |
| MIL-DTL-25988/3 | M25988/3-xxx | FVMQ (fluorosilicone) | Active; Revision A Notice 1 (Validation), 21-APR-2026 |
| MIL-DTL-25988/4 | M25988/4-xxx | FVMQ (fluorosilicone) | Active; Revision A Notice 1 (Validation), 21-APR-2026; next review 20-APR-2031 |
Before you order to one of these documents: what QPL-listed means for O-rings, and lot traceability for mil-spec O-rings.
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