The Pin,shoulder,headless, cataloged under National Stock Number 5315-00-439-8599, is classified within Federal Supply Class 5315 (Nails, Machine Keys, and Pins) of the Hardware and Abrasives group. The manufacturer of record is De Havilland Aircraft of Canada Limited. Government technical data includes 22 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5315-00-439-8599 |
| Primary Part Number | C4BM1551-1 |
| Item Name | Pin,shoulder,headless |
| FSC / FSG | 5315 / 53 — Nails, Machine Keys, and Pins |
| Manufacturer | De Havilland Aircraft of Canada Limited |
| Status | ACTIVE |
| Shank Diameter | 0.3120 INCHES NOMINAL IN |
| Second Shank Diameter | 0.3120 INCHES NOMINAL IN |
| First End Taper Length | 0.030 INCHES NOMINAL IN |
| First End Location | THREADED END |
| Second End Taper Angle | 15.0 DEGREES NOMINAL |
| Thread Length | 0.500 INCHES NOMINAL IN |
| First End Style | CHAMFERED |
| Shank Length | 0.6500 INCHES NOMINAL IN |
| Style Designator | SHOULDER |
| Material Document and Classification | STM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Second End Taper Length | 0.250 INCHES NOMINAL IN |
| First End Taper Angle | 15.0 DEGREES NOMINAL |
| Second End Relationship with First End | NOT IDENTICAL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Shoulder Diameter | 0.500 INCHES NOMINAL IN |
| Second Shank Length | 0.6600 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Second End Style | CHAMFERED |
| Thread Class | 2A A |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| C4BM1551-1 PRIMARY | De Havilland Aircraft of Canada Limited (CAN) |
| Reference | Meaning |
|---|---|
| 1560AC1-058 | 5/2 Secondary reference U.S. Government activity |
NSN 5315-00-439-8599 is a Pin,shoulder,headless, manufactured by De Havilland Aircraft of Canada Limited, classified under FSC 5315, Nails, Machine Keys, and Pins. Status: active.
NSN 5315-00-439-8599 has 1 manufacturer part number on file: C4BM1551-1 (De Havilland Aircraft of Canada Limited).
Key specifications for C4BM1551-1: Shank Diameter: 0.3120 INCHES NOMINAL IN; Second Shank Diameter: 0.3120 INCHES NOMINAL IN; First End Taper Length: 0.030 INCHES NOMINAL IN; First End Location: THREADED END. 22 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.