The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-321-9727, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Div Huck Products Division. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-321-9727 |
| Primary Part Number | D792577L |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Huck International, Inc. Div Huck Products Division |
| Status | ACTIVE |
| Head Height | 0.150 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN |
| Fastener Length | 1.000 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| Thread Length | 0.335 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5734 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| First Diameter From Head | 0.175 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.665 INCHES NOMINAL IN |
| Locking Feature | PELLET THREADS |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | PASSIVATE FASTENER |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 28 |
| Material | IRON ALLOY 660 FASTENER |
| Material | PLASTIC POLYAMIDE NYLON LOCKING FEATURE |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| D792577L PRIMARY | Huck International, Inc. Div Huck Products Division (USA) |
| 5223439-2 | Hiiesalu Alan J Dba Thoroughbred Precision (USA) |
| 5223439-2 | Accurate Screw Machine Corp Div Accurate Screw Machine Corporation (USA) |
| Reference | Meaning |
|---|---|
| D792577L | 5/9 Secondary reference U.S. Government activity |
| 5223439-2 | 7/2 Vendor item drawing reference Naval Sea Systems Command |
NSN 5306-01-321-9727 is a Bolt,externally Relieved Body, manufactured by Huck International, Inc. Div Huck Products Division, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-321-9727 has 3 manufacturer part numbers on file: D792577L (Huck International, Inc. Div Huck Products Division), 5223439-2 (Hiiesalu Alan J Dba Thoroughbred Precision), 5223439-2 (Accurate Screw Machine Corp Div Accurate Screw Machine Corporation).
Key specifications for D792577L: Head Height: 0.150 INCHES MINIMUM AND 0.175 INCHES MAXIMUM IN; Fastener Length: 1.000 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER; Thread Length: 0.335 INCHES NOMINAL IN. 19 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.