The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-172-8815, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 — Bolts (FSG 53) |
| Manufacturers | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (CAGE 16258); Sps Technologies, Llc Dba PB Fasteners (CAGE 56878); Valley-Todeco, Inc. Dba Arconic Fastening Systems (CAGE 06710); Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (CAGE 06725) |
| Parameter | Value |
|---|---|
| NSN | 5306-01-172-8815 |
| Primary Part Number | HS4057-14D |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| HS4057-14D PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| HS4057-14D PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HS4057-14D PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| HS4057-14D PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| HS4057-14D | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
| HS4057-14D | 5/2 Secondary reference U.S. Government activity |
| HS4057-14D | 7/2 Vendor item drawing reference The Boeing Company |
NSN 5306-01-172-8815 is a Bolt,close Tolerance, manufactured by Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-172-8815 has 4 manufacturer part numbers on file: HS4057-14D (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), HS4057-14D (Sps Technologies, Llc Dba PB Fasteners), HS4057-14D (Valley-Todeco, Inc. Dba Arconic Fastening Systems), HS4057-14D (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
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.