The Washer,lock, cataloged under National Stock Number 5310-00-527-3634, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Colt Canada Corporation. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5310-00-527-3634 |
| Primary Part Number | CF90001 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Colt Canada Corporation |
| Status | CANCELLED |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM |
| Style Designator | FLAT EXTERNAL TEETH |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.494 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Material Thickness | 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | B TYPE |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 410 OVERALL |
| Hole Diameter | 0.256 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| CF90001 | Colt Canada Corporation (CAN) |
| MS35335-61 | Bushmaster Firearms International, Llc (USA) |
| Reference | Meaning |
|---|---|
| 5310PL0912445 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 824636-7 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
| 303480 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| MS35335-61 | 2/2 Government specification standardization U.S. Government activity |
| MILW6986TYPEB | 4/1 Identification reference U.S. Government activity |
| 5310005273634 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 32940 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 10121454 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 824636-7 | 5/1 Secondary reference Lockheed Martin Corporation Div Rms |
NSN 5310-00-527-3634 is a Washer,lock, manufactured by Colt Canada Corporation, classified under FSC 5310, Nuts and Washers. Status: cancelled.
NSN 5310-00-527-3634 has 2 manufacturer part numbers on file: CF90001 (Colt Canada Corporation), MS35335-61 (Bushmaster Firearms International, Llc).
5 possible matches (shared part number, not a government interchangeability claim): 5910-00-752-4453, 1680-01-056-4287, 4010-01-109-5350. Verify interchangeability with system specifications before substitution.
Key specifications for CF90001: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM; Style Designator: FLAT EXTERNAL TEETH; Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL. 10 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5310-00-527-3634 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.