Manalete 214-Piece Nut and Bolt Thread Checker Kit with SAE, Metric and Drill Gauges

When a bolt needs to be matched during an engine-bay repair, the Manalete thread checker kit brings individual gauges into tight spaces for a direct size check.

Its set combines SAE and metric thread gauges with a drill bit gauge, helping identify both fasteners and loose drill bits at the bench or on a job.

Color-coded thread gauges distinguish the blue SAE set from the red metric set. Laser-engraved markings make each size easy to read during selection.

Key points

The kit lists 70 thread gauges: 37 SAE sizes and 33 metric sizes. It also includes 144 drill gauges, for a stated total of 214 gauges. The detachable, pull-out thread gauges can be used individually, a practical format when access is limited compared with a fixed board-style checker.

The aluminum gauges are CNC-machined, and their markings are laser-engraved. The SAE thread gauges meet ANSI B1.1 2A/2B, while the metric gauges comply with ISO 68-1 6G/6H. These standards and the clear size labels support Go/No-Go thread checks when matching nuts and bolts.

The drill gauge covers 118 imperial sizes (#60–#1, A–Z, and 1/64"–1/2") plus 26 metric sizes from 1mm to 14mm. That range gives mechanics and DIY users a way to identify worn or unmarked bits alongside their fastener work.

Customer feedback highlights the kit’s functionality, while comments on the case and whether the delivered assortment matches the advertised piece count are mixed. The listed configuration comprises 70 thread gauges and 144 drill gauges.

Quick sizing guide

Choose the blue gauges for SAE threads and the red gauges for metric threads. The metric set includes sizes from M2 × 0.4 through M24 × 3.0, with multiple thread pitches across common sizes. The SAE selection includes numbered and fractional thread sizes. For drill bits, use the imperial or metric openings that correspond to the bit’s sizing system, the gauge covers #60–#1, A–Z, 1/64"–1/2", and 1mm–14mm.

How to use it

Pull out an individual thread gauge and compare it with the fastener you need to identify, using the marked size and the Go/No-Go check. The detachable format is useful when working around crowded components, including tight engine bays. To identify a drill bit, place it against the matching opening in the drill gauge and read the labeled size. Keep the SAE and metric selections distinct while sorting hardware so the matching size system is easy to locate.

Before you decide

Which thread gauges are included? The kit lists 37 blue SAE gauges and 33 red metric gauges, covering standard and metric thread sizes.

Can it identify drill bits as well as bolts? Yes. Its separate drill gauge has 144 openings: 118 imperial sizes and 26 metric sizes, useful for identifying bits whose markings have worn away.

How do the SAE and metric gauges differ? They are color-coded for quick selection: blue for SAE and red for metric. The listed standards are ANSI B1.1 2A/2B for SAE and ISO 68-1 6G/6H for metric.

When it makes sense

This set suits mechanics, machinists, contractors, and home workshop users who regularly sort mixed fasteners or need to identify drill bits. Its combination of thread and drill gauges makes it a practical fit for auto repair, plumbing, HVAC, and household fastening tasks. For work that calls for checking both thread sizes and drill-bit sizes in one kit, the Manalete provides a clearly marked, detachable gauge set to keep those identification tasks together.