HL10-12-6 decoded
Family	Hi-Lok (LISI)
Head style	Protruding shear head (source: Hi-Shear HL10 drawing, title block, sheet 2)
Nominal diameter	3/8" (-12)
Grip	max grip 0.375" (-06 = 6/16")
Material	Titanium: 6Al-4V titanium alloy per AMS4928 or AMS4967, 95,000 psi shear min

Decoded from the published numbering scheme; not a claim that this exact dash number is a stocked SKU.

Reference only: the controlling drawing, its process spec and the manufacturer's installation instructions govern. How to use these answers

Dimensions

Also printed in Hi-Shear HL10 Rev 40 for this part

Grip	Max grip .375 in (dash -6, 1/16ths), MAX GRIP ±.005; stack .3125 to .375 in from the 1/16 grip variation (HL10 sheet 2 CODE, sheet 1 figure)
Thread	PIN 3/8-24UNJF-3A Modified (HL10 sheet 1)
Pin strength	Double shear 21,000 lb min, tension 8,700 lb min. "LOWER STRENGTH (PIN OR COLLAR) DETERMINES SYSTEM STRENGTH." (HL10 sheet 1)
Hex socket (not modelled)	W .1617/.1582, T .200/.180, Y .217/.197 (HL10 sheet 1)
Hole	Hole preparation per NAS618 (HL10 note 4; not in hand). The installed model draws the hole at D. (HL10 sheet 2)

Series and strength (datasheet)

HL10 / HL18 protruding shear head · HL11 / HL19 100° flush shear head · typical collars HL70, HL79, HL82, HL94, HL97

HL10: 6Al-4V titanium, 95,000 psi shear minimum; HL18: alloy steel, 95,000 psi shear (160,000-180,000 psi tensile): Hi-Shear drawings (Hi-Lok Product Specification 342).

Datasheet (PDF) ↗

Model: Monogram drawing Hi-Shear HL10 Rev 40

Envelope model, not manufacturer CAD.Model details

Other head styles, same diameter and grip

HL11-12-6 100° flush shear head

HL10 grip chart: 3/8" (-12)

15 grips

Every catalogued max-grip dash number at this diameter. Stack thickness must fall inside the fastener's grip range: see the design calculators.

HL10-12-2 HL10-12-3 HL10-12-4 HL10-12-5 HL10-12-6 HL10-12-7 HL10-12-8 HL10-12-9 HL10-12-10 HL10-12-11 HL10-12-12 HL10-12-13 HL10-12-14 HL10-12-15 HL10-12-16

Other diameters at this grip:

HL10-5-6 HL10-6-6 HL10-8-6 HL10-10-6

Elevation of a pin.US 2,940,495, Lock nut with frangible driving portion (Wing, Hi-Shear Rivet Tool Co.), Fig. 1 ↗ · US patent drawingWhy this family: Later patents (e.g. US 5,305,666) state the basic Hi-Lok fastener is disclosed in US 2,940,495, G. S. Wing, assigned to Hi-Shear Rivet Tool Co., 1960.

Elevation of a collar. — Elevation of a pin.US 2,940,495, Lock nut with frangible driving portion (Wing, Hi-Shear Rivet Tool Co.), Fig. 1 ↗ · US patent drawingWhy this family: Later patents (e.g. US 5,305,666) state the basic Hi-Lok fastener is disclosed in US 2,940,495, G. S. Wing, assigned to Hi-Shear Rivet Tool Co., 1960.

Required tooling, every brand

Tool catalogs, cited

HL10-12-6 (Hi-Lok, 3/8"): the process document lists these tools for this size.

Hi-Lok adaptor toolsStandard power or hand tools with Hi-Lok adaptor toolsHi-Shear Hi-Lok and Hi-Lok/Hi-Tigue Installation Instructions p.7 ↗
HLH311Hand Tool AssemblyHi-Shear Hi-Lok and Hi-Lok/Hi-Tigue Installation Instructions p.9 ↗

No per-size tool and nose table is on file for this family: see Sources.

Hi-Lok tool tables

Sources2

Hi-Shear Hi-Lok and Hi-Lok/Hi-Tigue Installation Instructions, p.7, H. Tooling ↗
- "Hi-Lok adaptors tools are fitted to high speed, pistol grip and ratchet wrench drivers in straight, 90°, offset, extension and automatic collar-feed configurations. Refer to Hi-Shear Corporation's Hi-Lok/Hi-Tigue Tool Catalog for a complete description of a wide variety of Hi-Lok drivers and accessories."
Hi-Shear Hi-Lok and Hi-Lok/Hi-Tigue Installation Instructions, p.9, H.3 Hand Tools ↗
- "The Hi-Lok fastener may be installed with hand tools, Allen hex keys and open-end or ratchet type wrenches."

Not documented

The Hi-Lok process document names tools for this size but prints no per-size tool and nose (adaptor) table; the maker's tool catalog it points to is not on file.

Diameter -12 (3/8"): decoded from the part number.

Tool catalogs are the manufacturers' as published in the cited edition; confirm current PNs with the tool maker before purchase. Install per the OEM process specification.

Install tooling

Install tooling: Hex key (holds the pin) and collar driver (Howmet Hi-Lok system)

Hi-Lok tool tables · Open in the tooling finder

Decode details

Decode details
Series	Hi-Lok pin HL10
Decode confidence	high
Numbering source	Hi-Shear HL10 drawing sheet 2 (Code)

"First dash number indicates nominal diameter in 1/32nds. Second dash number indicates maximum grip in 1/16ths." (HL10 sheet 2)
No finish-code letters present.
Head and material from the drawing title block.
Collars are separate part numbers (HL10 lists typical collars HL70, HL79, HL82, HL94, HL97).

Government reference cross-reference (DLA FLIS)

not listed under this PN

HL10-12-6 is not listed in FLIS under this exact part number (FLIS data as of 2025-03-18, March 2025 snapshot). FLIS may record it with a material or finish code, or under the standard part number.

Source: DLA PUB LOG ↗. Search any part number in the decoder.

Cross-reference HL10-12-6

Hi-Lok by LISI, pin and collar
Datasheet (PDF) ↗
Manufacturer page ↗
Numbering: Hi-Shear HL10 drawing sheet 2 (Code) ↗
Geometry: Hi-Shear HL10 Rev 40 ↗

Family-level estimate, not specific to HL10-12-6: Low (SpecLok sourcing assessment; no DLA lead time or stock on file for this part number)

Supply signal

not in FLIS by this PN; no SpecLok quotes yet

Supply signalfor this part number

Not listed in FLIS under this exact part number (March 2025 snapshot).
No SpecLok quotes yet.

A signal from records SpecLok holds, not availability, stock or a lead-time promise. FLIS lists who has recorded a part number for the item, not who makes it today. DoD awards carry no NSN or part number, so award activity is for the item name's class.

Sources: DLA FLIS Data Electronic Reading Room (PUB LOG) ↗, DLA PUB LOG ↗, USAspending.gov award search API ↗; DoD award data 2025-10-01 to 2026-07-06; compiled 2026-10-02.