The Pin,shoulder,headless, cataloged under National Stock Number 5315-01-191-3399, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is Mission Systems Wimborne Limited Div Cobham Mission Systems Wimborne Ltd. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-01-191-3399 |
| Primary Part Number | MD31623-54 |
| Item Name | Pin,shoulder,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | Mission Systems Wimborne Limited Div Cobham Mission Systems Wimborne Ltd |
| Status | ACTIVE |
| Shank Diameter | 0.5555 INCHES MINIMUM AND 0.5570 INCHES MAXIMUM IN |
| Second Shank Diameter | 0.5555 INCHES MINIMUM AND 0.5570 INCHES MAXIMUM IN |
| Surface Finish | 32.0 MICROINCHES SHOULDER OUTSIDE DIAMETER |
| First End Location | BOTH ENDS |
| Surface Treatment Document and Classification | PS 13102,CLASS A,FSCM K0349 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| First End Style | SQUARE |
| Hardness Rating | 43.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Length | 0.185 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN |
| Style Designator | SHOULDER |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Second End Relationship with First End | IDENTICAL |
| Shoulder Diameter | 0.7017 INCHES MINIMUM AND 0.7027 INCHES MAXIMUM IN |
| Second Shank Length | 0.185 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN |
| Surface Treatment | CHROMIUM OVERALL |
| Material | STEEL COMP XM-13 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| MD31623-54 | Mission Systems Wimborne Limited Div Cobham Mission Systems Wimborne Ltd (GBR) |
| Reference | Meaning |
|---|---|
| MD31623-54 | 3/9 Design control — primary reference M L Aviation Ltd (incorporating M L Wallop Defence Systems Ltd) |
| MD31623-54 | 5/9 Secondary reference Textron Ground Support Equipment Uk Limited Div Aircraft Handling and Airport Equipment |
NSN 5315-01-191-3399 is a Pin,shoulder,headless, manufactured by Mission Systems Wimborne Limited Div Cobham Mission Systems Wimborne Ltd, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-01-191-3399 has 1 manufacturer part number on file: MD31623-54 (Mission Systems Wimborne Limited Div Cobham Mission Systems Wimborne Ltd).
Key specifications for MD31623-54: Shank Diameter: 0.5555 INCHES MINIMUM AND 0.5570 INCHES MAXIMUM IN; Second Shank Diameter: 0.5555 INCHES MINIMUM AND 0.5570 INCHES MAXIMUM IN; Surface Finish: 32.0 MICROINCHES SHOULDER OUTSIDE DIAMETER; First End Location: BOTH ENDS. 15 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.
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.