Name: Hi-Lite
Brand: LISI

Two-sided, pin and collar (threaded): “COLLAR WRENCHING DEVICE AUTOMATICALLY SHEARS OFF” (Hi-Shear HST10 drawing, p.sheet 1, Hi-Lite ST pin and collar after assembly)

Shear: 95 ksi
Blind bulb: n/a
Install: Both sides needed
Diameters: 5/32, 3/16, 1/4, 5/16, 3/8"
Lead-time risk (SpecLok assessment): Medium

Typical applications

·Pin-and-collar joints with two-side access (HST10 + HST collar)

Strengths

+Titanium pin, 95 ksi shear (HST10)
+Collar wrenching device shears off at installation (HST10 drawing)

Trade-offs

−Needs access to both sides (pin and collar)
−Order pin and matching HST collar (HST10 drawing: pin and collar assembly part number)

Also called HiLite, Hi Lite. P/N: HST10 Hi-Lite ST pin (Hi-Shear) · e.g. HST10-8-8 / HST1079-8-8

Datasheet strength: 6Al-4V titanium, 95 ksi shear min; 3/16" double shear 5,380 lb min: Hi-Shear HST10 drawing (Product Spec 380).

Standards

Hi-Lite Product Specification 380 (HST10)

Materials and galvanic compatibility vs CFRP

Alloy	Shear	vs CFRP	Notes	Source
Titanium	95 ksi	low	6Al-4V per AMS4928/4967	HST10 drawing sheet 2: 95,000 psi shear min

vs CFRP: MIL-STD-889C Table I, graphite column: high = incompatible in all environments; low = compatible except sea-water immersion; unrated = SpecLok has not read a rating for this material.About derived ksi

Derived ksi values are min shear ÷ nominal shank area, computed from the datasheet's lbf/kN figures; the datasheet itself publishes no ksi.

Specs source: Hi-Shear HST10 drawing (Hi-Lite ST pin, archived) ↗: Sheet 1: sizes 5/32"-1", double shear & tension minimums; sheet 2: 6Al-4V material, 95 ksi shear, part-number code, Product Spec 380. Lead-time risk is SpecLok's sourcing assessment, not a datasheet value.

4 head styles

Some variants only partly sourced

Not redrawn: no head dimensions for this variant in the documents on file. The data at right is from the cited document.

Protruding shear head

HST10: 6Al-4V titanium, 95 ksi shear min (Product Spec 380)

Source: Hi-Shear HST10 drawing, title block, sheet 2 ↗

Material is published on the HST10 drawing only; HST11 to HST13 are shown from their title blocks.

Head styles (manufacturer terms)

Protruding shear head (HST10)
100° flush shear head (HST11)
Protruding tension head (HST12)
100° flush MS24694 tension head (HST13)

Axial cross-section of the presently-preferred embodiment: a shear flow joint of two sheets, the pin (head, cylindrical shank, reducing transition and neck sections) and a collar with a drive section that shears off at a predetermined torque.US 4,326,825, Balanced pin for shear flow joint, and joint including the pin (Hi-Shear), Fig. 1 ↗ · US patent drawingWhy this family: Hi-Shear's HST10 Hi-Lite ST pin standard lists "U.S. Patents 4,326,825; 4,485,510 and 4,957,401". US 4,326,825: "Balanced pin for shear flow joint, and joint including the pin", Hi-Shear Corp., 1982.

Enlarged view of a portion of Fig. 1: the pin's shank, reducing transition section and neck. — Axial cross-section of the presently-preferred embodiment: a shear flow joint of two sheets, the pin (head, cylindrical shank, reducing transition and neck sections) and a collar with a drive section that shears off at a predetermined torque.US 4,326,825, Balanced pin for shear flow joint, and joint including the pin (Hi-Shear), Fig. 1 ↗ · US patent drawingWhy this family: Hi-Shear's HST10 Hi-Lite ST pin standard lists "U.S. Patents 4,326,825; 4,485,510 and 4,957,401". US 4,326,825: "Balanced pin for shear flow joint, and joint including the pin", Hi-Shear Corp., 1982.

Compare every family's mechanism

Installation verification and preload

Installed preload

Preload force is not published. Collar torque-off ranges are published per size on the LISI HST collar drawings (Hi-Lite Product Specification 381): HST1078 A-286 tension collar -5: 30-40 in-lb, -6: 40-50, -8: 110-130, -10: 200-250, up to -20: 1350-1550.

What to check after install

Wrenching element must have broken away at the controlled torque; no further torque inspection is specified.
Post-install dimensional criteria are not published on the collar drawing; consult the program process spec.

Check gauges (1) and sources.Details

None published on the LISI drawings checked.

Sources: HST1078 collar drawing (LISI) · LISI Hi-Lok / Hi-Lite collars. Acceptance limits belong to the controlling spec; verify against your program's process documentation.

Print a shop verification card for the floor

Tool: Hex key and collar driver
Special / proprietary: Standard tooling
Training: Not stated in the cited documents.
Inspection: Collar wrenching device sheared off (HST10 drawing).

HST10 drawing, "Hi-Lite ST pin and collar after assembly" view: "Collar wrenching device automatically shears off".

The published install tool and nose for each size, other access options, and the gauges that check the install, from the manufacturer's own tool tables.

Tool: Hex key and collar driver

The LISI Hi-Lite tool catalog was not retrievable; Hi-Shear's installation instructions cover Hi-Lok and Hi-Lok/Hi-Tigue, not Hi-Lite. Confirm drivers with LISI.

Full tool tables, envelopes, clearances and source notes Compare tooling burden across all 25 families

Removal

No published removal procedure found; follow the manufacturer's instructions. Manufacturer page ↗

P/N series HST10 Hi-Lite ST pin (Hi-Shear) · e.g. HST10-8-8 / HST1079-8-8Paste a full part number into the decoder.

Manufacturer: LISI
Category: Pin and collar

Datasheet (PDF) ↗
Manufacturer page ↗
Hi-Shear HST10 drawing (Hi-Lite ST pin, archived) ↗: Sheet 1: sizes 5/32"-1", double shear & tension minimums; sheet 2: 6Al-4V material, 95 ksi shear, part-number code, Product Spec 380.

Find the part number for your stack

DiameterStack thickness, in

SpecLok has no dash-number table for this family yet: the quote line goes out as the family, part number to be confirmed.

QtyInclude install tooling

Sourcing

Lead-time risk (SpecLok sourcing assessment): Medium

Get quotes: SpecLok sources this from authorized distributors and returns price, lead time and certs.You buy from the authorized distributor, who is named on your returned quote. SpecLok is free for buyers.

Supply signalfor this family

169 NSNs carry a part number of this family, recorded by 28 CAGE codes (FLIS, March 2025).
Last DoD award for PIN-RIVET items (FSC 5320): 2026-06-25; 2,535 awards since 2025-10-01.
Last DoD award for COLLAR,PIN-RIVET items (FSC 5320): 2026-06-25; 433 awards since 2025-10-01.
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 2026-09-28.