Howmet/Huck, blind bolt
Huck BOM (industrial)
Howmet's industrial steel blind bolt (BOM); commercial spec, not an aerospace part.
- Shear 93-105 ksi
- Access Blind (one-sided)
- Diameters 3/16 to 0.75"
- Materials Carbon steel
- Lead-time risk Medium
Blind (one-sided), pull-type blind bolt: “And because they install from just one side, BOMs can be used in all blind side applications.” (Howmet Huck BOM brochure, p.2)
- Shear
- 93-105 ksi
- Blind bulb
- standard
- Install
- One-side install
- Diameters
- 3/16, 1/4, 5/16, 3/8, 1/2, 0.625, 0.75"
- Lead-time risk (SpecLok assessment)
- Medium
This is a commercial/industrial fastener: it isn't procured to a NAS, NASM, MS or AS standard and has no published MMPDS allowables. That's fine for many non-flight uses. How industrial and aerospace fasteners differ
Typical applications
- ·Industrial structure: truck/trailer, rail car, heavy equipment (Howmet industrial product line)
- ·Ground support equipment and tooling (not flight hardware)
Strengths
- +Installed min shear 2,800 lb (3/16") to 45,100 lb (3/4") (brochure)
- +Swaged collar locked to the pin; "pin separates near flush" when installed (brochure)
Trade-offs
- −Industrial product: not procured to an aerospace spec, no published MMPDS allowables
- −Steel (brochure); MIL-STD-889C rates carbon steel incompatible with graphite
- −Howmet installation tool
Also called BOM, BOM-R. P/N: BOM-R[dia]-[grip] · e.g. BOM-R8-6
Datasheet strength: Installed min shear 2,800 lb (3/16") to 45,100 lb (3/4"), steel; lbf not ksi: Huck BOM brochure.
Standards
- Howmet commercial BOM series (no NAS/MS spec)
Materials and galvanic compatibility vs CFRP
| Alloy | Shear | vs CFRP | Notes | Source |
|---|---|---|---|---|
| Carbon steel | 93 ksi | high | Low-carbon steel sleeve, medium-carbon steel pin, zinc plated | Derived: BOM brochure installed min shear (2,800 lb 3/16" to 45,100 lb 3/4") ÷ nominal area = 93-105 ksi |
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
Specs source: Howmet BOM brochure ↗: Part-number system (BOM-R = steel), materials & finishes, installed values (lbf) 3/16"-3/4", grip and inspection data. Lead-time risk is SpecLok's sourcing assessment, not a datasheet value.
1 head styles
Some variants only partly sourcedNot redrawn: no head dimensions for this variant in the documents on file. The data at right is from the cited document.
Head style not named in the BOM brochure
- BOM-R: Steel (R): low carbon steel sleeve, medium carbon steel pin, zinc plated
Sizes and grip: BOM-R (diameter)-(grip number), e.g. BOM-R8-6.
Source: Howmet BOM brochure, part number system; materials and finishes ↗
The BOM brochure does not name a head style.
Head styles (manufacturer terms)
- Head style not named in the BOM brochure (BOM-R)
Pulled stem / bulbing · 4 steps
1/4Inserted
“Insert the fastener into the hole and slip the installation tool over the pintail.”
Howmet Huck BOM brochure, p.3, Installation Sequence ↗
Drawing traced from: Panel 1.
Official manufacturer install demonstration: Huck BOM (industrial) installation.
Installation verification and preload
Installed preload
Not published. Installed values are minimum ultimate shear/tensile only (tested at grip of at least 1.5x diameter).
What to check after install
- Pin separating near flush = correctly installed (stated completion criterion).
- Installed inspection dimensions published per diameter, 3/16" through 3/4" (brochure Inspection Data: swaged collar diameter, pin-break offset, blind-side bulb diameter, axial positions).
Check gauges (1) and sources.Details
- Huck gage bulletins PB162 (grip) and PB509 (pin position / swage) apply; per-diameter tables not freely retrievable.
Sources: BOM brochure (Howmet). Acceptance limits belong to the controlling spec; verify against your program's process documentation.
- Tool
- Huck installation tool ("push-and-pull installation", BOM brochure)
- Special / proprietary
- Special tooling · proprietary
- Training
- Not stated in the cited documents.
- Inspection
- Pin separates near flush; installed dimensions per brochure Inspection Data.
"As the tool pulls on the pintail ... the swaging anvil overcomes ... locking the collar to the pin"; "when the pin separates near flush, the BOM fastener is installed correctly" (BOM brochure).
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.
| Dia. | Published tool + nose | Other access | Gauges |
|---|---|---|---|
| -6 | 254 + 99-1053 | None published | PB162 / PB509 |
| -8 | 254 + 99-830-1 | None published | PB162 / PB509 |
| -10 | 256 + 99-769 | None published | PB162 / PB509 |
| -12 | 256 + 99-1272 ("Use only in very low volume repair applications") | None published | PB162 / PB509 |
| -16 | 2624 + 99-5107 | None published | PB162 / PB509 |
| -20 | 2624 + 99-5102 | None published | PB162 / PB509 |
| -24 | 3585 + 99-5103 | None published | PB162 / PB509 |
Full tool tables, envelopes, clearances and source notesCompare tooling burden across all 25 families
Removal
No published removal procedure found; follow the manufacturer's instructions. Manufacturer page ↗
P/N series BOM-R[dia]-[grip] · e.g. BOM-R8-6Paste a full part number into the decoder.
- Manufacturer
- Howmet/Huck
- Category
- Blind bolt
- Datasheet (PDF) ↗
- Manufacturer page ↗
- Howmet BOM brochure ↗: Part-number system (BOM-R = steel), materials & finishes, installed values (lbf) 3/16"-3/4", grip and inspection data.
Find the part number for your stack
SpecLok has no dash-number table for this family yet: the quote line goes out as the family, part number to be confirmed.
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
- No FLIS records linked to this family yet.
- 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.
Image credits: Howmet Aerospace, Huck BOM® brochure, p.1 ↗. Product images belong to their manufacturers.
Sources (7)
- Howmet Huck BOM brochure
- Howmet/Huck product page
- Huck BOM (industrial) installation video
- 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.
- DLA FLIS Data Electronic Reading Room (PUB LOG)
- DLA PUB LOG
- USAspending.gov award search API
Next · Find
Check Huck BOM (industrial) against your joint
Describe the joint in the selector to see how this family ranks, with the cited design rules.