Cross reference · Hi-Shear (LISI Aerospace) · Pin-rivet
HL556 cross referenceSPS AICL247AX5C, Boeing 3M278A
HL556 is a Hi-Shear pin-rivet series on 12 government stock numbers. Its closest equivalents are SPS AICL247AX5C, Boeing 3M278A. Each one is labeled with how strong the evidence is.
- Issued by Hi-Shear
- Item Pin-rivet
- Stock numbers 12
- Equivalents 4
Equivalents in the government catalog
Catalog-only listings need engineering approval before you substitute.
Manufacturers
- AICL247AX5CSPS TechnologiesCatalog only, needs approvalon 6 of 12 stock numbers, 6 sizes
1 more on one stock number each: AICL247AX8C
- AICL247AX8CSPS TechnologiesCatalog only, needs approvalon 1 of 12 stock numbers
Airframer and OEM drawings
- 3M278ABoeingCatalog only, needs approvalon 11 of 12 stock numbers, 12 sizes
1 more on one stock number each: 3M278H
- 3M278HBoeingCatalog only, needs approvalon 1 of 12 stock numbers
Plus 1 reference number whose issuer SpecLok does not identify (distributors and catalog agencies are not named).
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Cited equivalents go on the request as acceptable alternates. Catalog-only listings do not.
Install tooling
Hi-Lok tooling (hex key (holds the pin) and collar driver (howmet hi-lok system))
Sizes by maker
| NSN | HL556 | AICL247AX5C | 3M278A | Last DLA price |
|---|---|---|---|---|
| 5320-01-211-1561 | HL556-5-2 | |||
| 5320-01-027-3168 | HL556-5-3 | AIC-L-247AX5C3 | 3M278A08-3 | |
| 5320-01-028-0842 | HL556-5-4 | AICL-247AX5C4 | 3M278A08-4 | |
| 5320-00-218-8216 | HL556-5-5 | AIC-L-247AX5C5 | 3M278A08-5 | |
| 5320-01-100-7055 | HL556-5-7 | AIC-L-247AX5C7 | 3M278A08-7 | |
| 5320-01-100-0681 | HL556-5-9 | AIC-L-247AX5C9 | 3M278A08-9 | |
| 5320-01-100-5221 | HL556-5-12 | AIC-L-247AX5C12 | 3M278A08-12 | |
| 5320-00-218-8333 | HL556-6-4 | 3M278A3-4 | ||
| 5320-00-218-8342 | HL556-6-5 | 3M278A3-5 | ||
| 5320-00-288-3174 | HL556-6-7 | 3M278A3-7 | ||
| 5320-01-193-1929 | HL556-8-4 | 3M278A4-4 | ||
| 5320-00-288-3178 | HL556-8-5 | 3M278A4-5 |
Each row is one National Stock Number and the part numbers DLA FLIS lists on it, as written there. A blank means FLIS lists no part in that series on the stock number, not that the size does not exist.
Sources and how to read this page.Details
Reference numbers the Federal Logistics Information System records against the same National Stock Number. A supply-catalog cross-reference, not an engineering-approved interchangeability: confirm against the controlling drawing or spec before substituting. Only equivalents marked cited have a manufacturer or government document, linked with each.
Source: DLA Federal Logistics Information System, via DLA PUB LOG ↗ (FLIS Data Electronic Reading Room ↗), data as of 2025-03-18 (March 2025 snapshot). Federal supply class 5320 Rivets. Issuer names are SpecLok's reading of the filing CAGE code; distributors are not named. Compiled 2026-10-02.
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