Shop verification card
Blind rivet nut (MS27130, now NAS1329 / NAS1330)
generic-NAS · Blind rivet nut · MS27130-[material][dash][K] · e.g. MS27130-A26K · superseded by NAS1329 (flat head) / NAS1330 (countersunk head)
speclok.com
10/1/2026
Install sequence
1. On the mandrel
2. In the hole
3. Mandrel retracts, body expands
4. Installed, ready for a screw
Traced from US 2,149,199 (Tubular rivet, B. F. Goodrich), p.1 (drawing sheet), Figs. 1-3, 6. Not to scale.
Before you install
- Sizes offered: .112-40UNC-3B to .500-20UNF-3B (MS27130F Tables I and III)
- Tool: Pull-up tool with a threaded mandrel (Rivnut hand or power tools)
- Special, non-proprietary tooling.
- Training: Not stated in the cited documents.
- Lead-time risk: Medium
Installed preload
Not published. MS27130F gives minimum tensile and single shear strength (Table V) only; FAA-H-8083-31B and the Böllhoff RIVNUT catalog give no preload.
Removal
No published removal procedure found; follow the manufacturer's instructions. Steps: speclok.com/tooling/blind-rivet-nut#removal
Accept / reject after install
- "Correct installation requires good hole preparation, removal of burrs, and holding the sheets in contact while heading. Like any sheet metal fastener, a rivet nut should fit snugly into its hole." (FAA-H-8083-31B p.4-56)
- Install hole, MS27130F Table II (flathead), min-max: .112: .155-.157 (drill 5/32); .138: .189-.193 (#12); .164: .221-.226 (#2); .190: .250-.256 (E); .250: .332-.338 (Q).
- Grip: the dash number sets the grip range and ident mark (MS27130F Tables I and III); "The part number identifies the type of rivet nut and the maximum grip length." (FAA-H-8083-31B p.4-55)
- Keyed nuts (K) go in a keyway cut to the Keyway Detail (MS27130F Table II, P and H).
Check gauges
- No inspection gauge is named in the documents read.
Sources: MS27130F · FAA-H-8083-31B p.4-55 to 4-56. Acceptance limits belong to the controlling spec: verify against your program's process documentation before use on hardware.